Tool supporting arrangement



July 14, 1931. I F. M. WILLIAMSON 1,314,274

TOOL SUFPORTING ARRANGEMENT,

Filed Nov. 1,1928

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BY {5 E ATTORNEY Patented July 14, 1931 FLOYD M. WILLIAMSON,

OF DETROIT, MICHIGAN r001. SUPPORTING ARRANGEMENT Application filed November 1, 1928. Serial No. 316,607.

This invention relates to improvements in tool supporting arrangements, and aims primarily to provide a simple and efiective means whereby punches may be held against rotation in their holders.

It is an object of the invention to provide a tool supporting arrangement in which a simple and cheaply made form of punch holder and separate holding device are employed in combination with a punch the shank of which needs but little extra machining, so that comparatively little extra work is involved in equipping a punch and punch holdor with my supporting arrangement.

Another object of the invention is to provide. a tool supporting arrangement wherein the holding device automatically engages the punch as soon as the latter is inserted in the punch holder, and from which the punch may be quickly and easily released.

With these and other objects and advantages in view which will become apparent as the specification proceeds, the invention is hereinafter more fully described with the aid of the accompanying drawings, in which:

Figure 1 illustrates a sectional view of the arrangement, and

Figure 2 is a cross section on the line 2-2 of Figure 1.

slightly modified form of construction, and Figure 4 is a section on the line 4-4 of Figure 3. Figure 5 is a cross section of another modified form of construction.

Referring to Figures 1 to 4 of the draw-,

annular groove 6 is cut, and 7 indicates a substantially radial passage through the holder from the bottom of the said groove. On one side of the punch holder at the bottom of the groove 6 a transverse cut 8 is made which is deep enough to pierce the bottom of the bore of the said punch holder.

Figure 3 shows a longitudinal section of a 3. The hole 2 is counterbored at one The shank'9 of a punch 10 extends into the bore of the punch holder and has a longitudinal key slot 11 and a transverse recess 12 cut therein. The recess is so located that when the punch shank is 'in position in its 3 the said recess registers with the verse cut 8. I

holder trans- 14 v designates a holding device usually made of a piece of spring wire. In the construction shown in Figures 1 and 2 o ne end 14a of this wire is straight and passes through the radial passage 7 in the punch holder and projects slot 11 of the punch. In the slightly m construction shown in Figures 3 and 4 the substantially radially into the key lies parallel With a portion of the key slot 11 in which it rests.

Intermediately of its length the holding device 14'is curved about a radius slightly.

larger than that of the bottom of the 6 in which it rests, and terminates at in a straight portion which extends across the cut portion 8 of the punch hold also bears against the recess 1-2 of the shank 9. In this manner both ends groove its end er and punch of the holding device engage the punch shank and 7 hold it against rotary movement. 15 nates holes extending from one end desigof the v punch nolder 3 into the groove 6, so that an instrument as shown at 16 in Figure be inserted to pry one end of the holding device out of-engagement from the s1de as shown at 1401 1n Figure 4.

3 may punch In Figure 5' the modification consists in the provlslon of a locking pin 18 through which one end 14a of a holding member 14 made of spring wire, passes; the

usually opposite end14g of the member is inturned and takes lnto an aperture 666 in'the bottom of a groove 6b cut in a punch holder The'latter supports a punch shank 9a. The

locking pin 18 passes'substantially radially through, and is slidable in, an open in the punch holder, transverse flat Set out on one side of the shank 9 It will be noted that in Fig "res 2 an ing" 7a and bears against a punch (14 in m ,3 member in said tending holding member is shown extending through more than one hundred and eighty degrees whereas in Figure 5 it extends through less than one hundred and eighty degrees. lhe amount of this angle may however be varied in each case as desired.

lVhile in the foregoing the preferred embodiments of the invention have been described and shown, it is understood that these constructions are subject to such modifications as fall within the scope of the appended claims.

IV hat I claim as my invention and desire to secure by Letters Patent is:

1. In a tool arrangement'of the character described, the combination of a tool having a shank thereon, a tool holder having a bore to receive said shank and an annular groove around its periphery, a resilient supporting groove extending partly around the latter, said tool holder having a radial passage therethr'ough from the bottom of said groove opening into said bore, and one end of said supporting member extending through said passage and bearing against said tool shank and means for positively holdingsaid shank against rotationin the bore o the tool holder. 7

2. In a tool arrangement of the character described, the combination of a tool having a shank at one end and a longitudinal key slot formed in said shank, a tool holder havinga longitudinal bore to receive said shank and an annular groove cut in its outer side, said tool holder also having a radial passage therethrough from the bottom of said groove to said bore, a resilientcurved holding member in said groove extending partly around said. groove, and an inturned end on said holding 'member projecting through said radial passage and taking into said key slot.

3. In an arrangement of the character de scribed, the combination of a tool supporting member having anaperture therein, a tubular tool holder in said aperture having an annular recess formed in its periphery and a transverse cut across said recess penetrating the bore ofthe tool holder, the latter also having a radial passage therethrough exfrom the base of the recess to its bore, a tool having'a shank tubular'tool holder, said shank having a longitudinal slot formed therein and a transverse slot which may register w th the transverse cut in the holder, and

a resilientmember extending aronndsaid recess, one end of said member projecting through said radial passage into the longitudinal shank slot and the opposite end of said member lying across the transverse tool holder slot and being.

adapted to seat in the transverse slot in the shank.

4. In an arrangement as described in claim 3, the combination wherein the tool iolder has an aperture formed therein from fitting into said FLOYD M. WILLIAMSON. 

